#条件判断
#age = 11
#if age >= 18:
   # print('your age is',age)
    #print('adult')
#elif age >= 6:
    #print('teenager')
#else:                           #如果if判断错误，就执行else
    #print('your age is',age)
    #print('kid')
#input
s= input('age:')
age = int(s)
if age < 25:
    print('青年')
else:
    print('中年')